Synergy
I kinda hope someone will learn Overlord based magic. I think aesthetic wise it would fit in with the MCU. Although utility wise, Dragon or God slaying magic from FT might be more useful since MC can ‘absorb’ the elements to fuel himself (Wendy inhaling air). Or maybe even from Tensei Slime! Nuclear magic looks epic xD
In marvel sorcerers can use their own personal energy to use magic but using it too much can be fatal just like when ninjas from Naruto use too much chakra. That's why they prefer to use universal or dimensional energy. Also they can use universal energy which is the energy of the world similar to senjutsu chakra from Naruto too. So using power from gods and other dimensions isn't the only way for sorcerers to use magic in marvel.